File Input Output MCQs

Question 1

In C, which library is used for file operations such as reading and writing files?

Accepted Answer

stdio.h

Answer

iostream.h

Answer

fileio.h

Answer

files.h

Question 2

Which function is used to open a file in C for writing?

Accepted Answer

fopen()

Answer

open()

Answer

writefile()

Answer

createfile()

Question 3

What does 'FILE' represent in C when working with files?

Accepted Answer

A file structure

Answer

A built-in data type for files

Answer

A file descriptor

Answer

A file pointer

Question 4

How do you check if a file was opened successfully in C?

Accepted Answer

Check the return value of fopen()

Answer

Use the 'filestatus' variable

Answer

Use the 'fileopen' function

Answer

Check the file's size

Question 5

Which function is used to write data to a file in C?

Accepted Answer

fwrite()

Answer

writefile()

Answer

filewrite()

Answer

putfile()

Question 6

What is the difference between 'r' and 'w' modes when opening a file in C?

Accepted Answer

'r' is for reading and 'w' is for writing, overwriting an existing file

Answer

'r' is for read-only and 'w' is for write-only

Answer

'r' is for reading and 'w' is for reading and writing

Answer

'r' is for read-only and 'w' is for write-only, creating a new file

Question 7

How do you read a character from a file in C?

Accepted Answer

getc()

Answer

readchar()

Answer

read()

Answer

getchar()

Question 8

What is the purpose of the 'fprintf' function in C?

Accepted Answer

To format and write data to a file

Answer

To read data from a file

Answer

To open a file

Answer

To close a file

Question 9

Which function is used to close a file in C?

Accepted Answer

fclose()

Answer

closefile()

Answer

endfile()

Answer

fileclose()